Printing – Bed-and-platen machines – Web
Patent
1978-04-04
1980-06-10
Pieprz, William
Printing
Bed-and-platen machines
Web
156384, 101288, 101292, 101316, 4001573, 400166, 400397, 400687, B41J 500
Patent
active
042067022
ABSTRACT:
A constant pressure printing mechanism for use with a hand labeler: an actuating lever, pivotally connected to the frame of the hand labeler, is divided into a hand lever and a printing lever, which are pivotally connected to each other; a printing head is carried by the printing lever; a shock-absorbing tensioned spring is interposed between the hand lever and the printing lever to bias them to rotate toward each other and to rotate the printing head toward the platen; a retaining lever, pivotally attached on the hand lever, is engageable with the printing platen upon descent of the printing lever; before such engagement, the retaining lever retains the hand lever on the printing lever to move together; when the printing head moves to the platen, the retaining lever is raised away from the printing lever by its engagement with the printing platen; this enables the hand lever to further pivot slightly against the biasing force of the tension spring, even when the printing head abuts against the platen, so that the shock given thereto can be absorbed to ensure printing is performed under a constant pressure.
REFERENCES:
patent: 1665467 (1928-04-01), Miller
patent: 2771609 (1956-11-01), Klopstock
patent: 4072105 (1978-02-01), Becker et al.
Kabushiki Kaisha Sato
Pieprz William
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